mcom creates a new draft message and opens it
in an editor. After editing, a loop is started where the user can send,
re-edit or cancel the message. Use
‘mcom-r’ to resume the editing of a
draft; by default, the last modified draft will be edited.

mrep creates the draft such that the message
will be a reply to msg.

mfwd creates the draft with a subject and
body appropriate for forwarding the message. By default, messages are
forwarded verbatim as MIME
‘message/rfc822’ attachments. Use
-r to forward as
mshow(1) rendered plain text,
using RFC 934 message encapsulation.

mbnc creates the draft from the original
msg (including headers) and adds a Resent-To
header, to which the message will be bounced directly. (See
mmsg(7) for the message argument
syntax.)